If the scene is a flat whitelight source then it looks like dirt/grease on the lens, perhaps a scratch. That should differ on each camera. Clean with a proper lens cloth, if it's a scratch you won't be able to clean it and the best approach is probably a repair/replacement of the lens front. There can be some similar effects to the dark smudge in the bottom left corner that arise from the direction to the light source.
So we may see clearly, two different white wall pics would help, but by the look of it it appears there may be something on or under the lens cover as mentioned, possibly on the lens itself which is protected by the lens cover.
Also, whatever is white appears out of focus too, if you take a screenshot of the camera's view then we see the settings you're using, that may help us further..
